DNA - Genealem's Genetic Genealogy

02 January 2014

X-Chromosome Matching at Family Tree DNA

What a New Year’s Celebration! The long-awaited X-Chromosome matching has arrived at Family Tree DNA and is now fully integrated it into Family Finder matching!

Happy Dance! Happy Dance!

But what is the X-Chromosome and how is it different?

The X-Chromosome is one of the chromosomes that determine gender. A female has two X-chromosomes (one from mom and one from dad). Males have one X-chromosome from mom as he receives the Y-chromosome from dad. The X-chromosome inherited from a mother acts like autosomal DNA in that it goes through recombination and is passed to all of a mother’s children. A father passes a copy of his X-chromosome only to his daughters and it does not go through recombination. Since the X-chromosome has a unique inheritance pattern, it contains genetic material from some, but not all of a person’s ancestors. The DNA from the X-chromosome is informative about both recent and deep ancestry.

The following fan charts from Blaine Bettinger’s blog are most helpful in understanding exactly who can contribute to the X-chromosome as it is inherited differently from the rest of our autosomes (those 22 other chromosomes) as well as for each gender. (Fan charts are courtesy of Blaine Bettinger, Ph.D.)

If you prefer a list of which ancestors could have contributed your X-Chromosome data, create an ahnentafel chart from your genealogy software and omit any numbered ancestors except those in the following chart. The following numbers are the ancestors in your ahnentafel chart that have contributed to your X-Chromosome. Share the an ahnentafel chart you created for your X-Chromosome with your X-matches to help focus on finding the common ancestor.

Female Inheritance

1	15	43	62	106	125	183	219	246
2	21	45	63	107	126	186	221	247
3	22	46	85	109	127	187	222	250
5	23	47	86	110	170	189	223	251
6	26	53	87	111	171	190	234	253
7	27	54	90	117	173	191	235	254
10	29	55	91	118	174	213	237	255
11	30	58	93	119	175	214	238
13	31	59	94	122	181	215	239
14	42	61	95	123	182	218	245

Male Inheritance with Percentages

1	55 (12.5%)	122(6.25%)	235 (6.25%)
3 (100%)	58(12.5%)	123 (6.25%)	237 (6.25%)
6 (50%)	59(12.5%)	125 (6.25%)	238 (3.125%)
7 (50%)	61(12.5%)	126 (3.125%)	239 (3.125%)
13 (50%)	62 (6.25%)	127 (3.125%)	245 (6.25%)
14 (25%)	63 (6.25%)	213 (12.5%)	246 (3.125%)
15 (25%)	106 (12.5%)	214 (6.25%)	247 (3.125%)
26 (25%)	107 (12.5%)	215 (6.25%)	250 3.125%)
27 (25%)	109 (12.5%)	218 (6.25%)	251 (3.125%)
29 (25%)	110 (6.25%)	219 (6.25%)	254 (1.5625%)
30 (12.5%)	111 (6.25%)	221 (6.25%)	254 (1.5625%)
31 (12.5%)	117 (12.5%)	222 (3.125%)	255 (1.5625%)
53 (25%)	118 (6.25%)	223 (3.125%)
54 (12.5%)	119 (6.25%)	234 (6.25%)

For a copy of both fan charts, see: http://www.thegeneticgenealogist.com/2008/12/21/unlocking-the-genealogical-secrets-of-the-x-chromosome/

http://www.thegeneticgenealogist.com/2009/01/12/more-x-chromosome-charts/

A variation of these charts can be seen at: http://freepages.genealogy.rootsweb.ancestry.com/~hulseberg/DNA/xinheritance.html

Viewing the X-Chromosome at Family Tree DNA

Links for the X-Chromosome have been added to the various Family Finder pages, so navigating the pages are basically the same for locating any of your matches information.

Use the pull-down menu under Family Finder and click on Matches.

On the Family Finder Matches page, there is a filter to show only X-Matches under the Relations drop-down menu.

When you use the X-Match filter on a male Family Finder kit, you should get only matches from the maternal X-Chromosome.

Next, like other Family Finder Matches you can expand the advanced bar for a match and click to add the match to the Compare in Chromosome Browser list.

Matches are then added to the Compare in Chromosome Browser list. By clicking on the Compare arrow, you could go right to the Chromosome Browser.

You can also go right to the Chromosome Browser from the Family Finder drop-down menu to view your X-chromosome matches.

The Chromosome Browser allows you to filter the match list by X-Matches. Under the drop-down menu Filter Matches By, select the X-Matches.

Here are three immediate relatives. The first two share X-Chromosome DNA. The third (green) one does not.

When you scroll down to the X at the bottom, we see that X-Matching is displayed for the first two but not the third.

The X-Chromosome matches have also been added to the Advance Matching section. Select Advanced Matching from the Family Finder drop-down menu. An X-Chromosome link has been added here as well.

X-Match is an option that can be checked alongside other types of testing.

Now, our autosomal results are complete! Happy Dance! Happy Dance!

Tea for two; two for tea

X for you; X for me

Now it is possible to see

All the matches of WE!

Enjoy,

Emily Aulicino

2 Jan 2014

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Genetic Genealogy

"Emily Aulicino is one of the most dynamic people I know. Her energy and enthusiasm has helped make Oregon the largest member per capita region in all of ISOGG. Emily’s educator background is apparent and complimentary to her speaking engagements which create a presentation that is easy-to-understand for any novice. Her reputation has made her an immensely popular speaker throughout the Pacific Northwest which has resulted in nationwide requests. Emily is a proven leader who welcomes a challenge. She manages many people and projects with skill and ability that can only be innate. I have the utmost confidence that Emily will excel at any task presented to her and I look forward to many more years working with her."
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Unsolicited Comments:

Barbara in Washington wrote:
I just wanted to touch base with you and tell you how impressed I was with your lectures today. They were fun and up, and you were able to explain the DNA process to me in terms that I could understand.

"Memoing" My Memories - Unsolicited Testimony

Rhonda in Oregon writes:
The writing tip you gave us Thursday is great! I went right to my stash of journals (I have trouble journaling, but love the books!), and made a page for every year since my birth year.
I’m very excited to start writing my memories down. Thanks again for a fantastic tip!!

Anne in Michigan writes:
"So many times I have sat down and tried to write out my life's story. I got so bored with myself that I never got more than a few pages done. This method has totally changed my outlook and has renewed my lifelong interest to write about my life so that my children will have something to remember me by.
I am psyched, pumped and ready to go now!”

Beth in Texas writes:
“I am finding the topics very helpful in writing about things I would have never thought about before. These topics give me an opportunity not to dwell on the unhappy times in my life, and remember some of the less important, but memorable topics that I'd like to pass on to my children. I'll still write about unhappy times, but they will be sprinkled in with other memories.”

Jan in Kentucky writes:
“Emily, you do so very much for so many, and it is so appreciated! You also have broken my writing block, and I appreciate that...if not for you, I don't know that I would have had the heart to return to it. You truly are doing a lot of good with that list of yours and the effects will be known for years and generations for so many. I think sometimes we just need to tell you that.”

Bob in Sherwood, Oregon writes:
THANKS to you I started writing my "story" last Friday. If it wasn't for you I probably wouldn't have started it. It's all your fault...You, You, "Inspirator", You! Telling us
to write in "pictures". If I started it prior to your presentation it would have begun... "I was born on October 29, 1944 in Jamestown, New York". Needless to say you had a GREAT impact on my writing.

Bill in New Jersey writes:
Just a short note to says thanks to you, Emily, for the prompts. I especially like the way in which you write the suggestions to go along with the prompts.

Books About Childhood Memories and Family Stories

As most of you know I seldom read fiction, and as a result, I am interested in books that are historical in nature and/or tell the stories of people's lives. The following list is some books that I have read which are by people I know, people who are related to me, people I have met, and people with whom I've corresponded for a time. Proudly, I have each author's autograph, and I'm beginning to think of this as a new collection/hobby of mine! .

Each of these stories have great struggles and challenges. Some are of childhood while others occurred when the author was an adult. I hope that you will find them interesting as I have. They are truly a slice of our American Life!